Apparatus for producing oscillating current.



.l. SCHIESSLER.

APPARATUS FOR PRODUCING OSCILLA'HNG CURRENT. APPLICATION men APR. 20. 1908.

1 ,1 98,776, v Patented Sept. 19, 1916.

JOSEF SCHIESSLER, OF BADEN, NEAR VIENNA, AUSTRIA-HUNGARY.

APPARATUS FOR PRODUCING OSCILLATING CURRENT.

Specification of Letters Patent. Patented Sept. 19, 1916.

Application filed April 20, 1908. Serial No. 428,255.

To all whom it may concern 7 Be it known that I, J osnr SCHIESSLER, residing at Baden, near Vienna, Austria- Hungary, a subject of the Emperor of Austria-Hungary, have invented certain new anduseful Improvements in Apparatus for Producing Oscillating Current; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled-in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The present invention relates to oscillating electric circuits, and embraces the use in such a circuit of a stable incandescent resistance. Arcs which are unstable have heretofore been used.

The accompanying drawing is a diagram illustrating mechanism for producing electrical oscillations in accordance with my invention.

A source of direct current 1 supplies current to a circuit containing two, preferably adjustable, windings or coils 2 and 4 connected in series by the connecting conductor 3. The arrows indicate the adjustability of these windings. The strength of current in the windings 2 and 4 and therefore the strength of the magnetic field produced by the windings or magnet coils 2 and 4 may be regulated at will by means of regulable resistance 5 in the circuit of battery 1.

Branching from points 6 and 7 are symmetrically arranged resistances 9 and 8 which act as choking coils that are connected at 10 and 11 to a completely closed circuit 1214. In this closed circuit is the incandescible resistance 12 which may be of Y platinum arranged in parallel with the windings 2, 4, and preferably placed between them in axial alinement. The incandescible resistance 12, illustrated as a winding, is connected in parallel with aregulable condenser 13. The condenser 13 is connected to the primary wlnding 14,-

having self induction, of a transformer- 1415 and forms aregulable oscillating circuit. The secondary winding 15 of the transformer is connectedto the endplates 16 of a capacity coupling whose innerplates of like sign are connected by the conductors 17 and 18 to the terminals 19 and 20, respectively, to which any desired apparatus is connected.

In front of the incandescent resistance is arranged means for blowing a blast or currentof air onto the resistance, for example, an electrically driven. fan 23 supplied with current through terminals 21 and 22.

As the invention involves primarily the energetic cooling of an incandescent solid resistance arranged in a magnetic field, the blower, or fan must produce a rotating blast -that must be increased with the increase in the transformation of energy. Consequently the speed of rotation of'the blower must be increased, and naturally the superimposed tone Will then be higher in. pitch,

The operation will be as follows: Current being supplied from the source 1, the platinum resistance winding 12 and the magnet windings 2 and 4 Will be traversed by current. The magnet windings 2 and 4 will produce a strong magnetic field whose intensity can .be regulated by the adjustable resistance 5. The incandescent resistance or winding 5 is arranged in the field produced by the windings 2 and 4 and coaxially thereof, and the temperature of the resistance may be controlled by the resistances 8 and 9 to any desired extent. If the fan be now set in motion, the strong current of air produced by the fan cools the resistance 12 energetically, and the temperature" vari-.

The action of the magnetic field is inten-.

sified by the fact that the incandescent resistance 12 is in the form of a solenoid or winding.

The two magnetic fields produced by coils .2, 4 and coil 12 respectively, mutually aflfect one another, and according to; their polarity, either mutually intensify" or weaken one another.

For this purpose the magnet windings 2 and 4 are arranged to be continually slidable or movable. The oscillations produced are transferred by the primary winding '14 of the transformer to the secondary winding 15.

Any suitable apparatus is connected to the circuit 13-l4 by means of the capacitative coupling 16 and condensers 17 and 18 and terminals 19, 20. I

The mechanism illustrating my invention, and shown by way of example, may be varied without departing from my invention.

I claim 1. In mechanism for producing electrical oscillations, the combination with an incan descent solid resistance, of a capacity and self induction in parallel therewith and means to direct a current of cooling air or gas onto said resistance.

2. In mechanism for producing electrical oscillations, the combination with an incandescent solid resistance; of a capacity and self induction in parallel therewith and a rotary fan arranged to direct a cooling blast onto said resistance.

3. In mechanism for producing electrical oscillations, the combination with means to produce a strong magnetic field; of a solid incandescent resistance co-aXiall-y"arranged in said field, a self induction and a capacity in parallel with said resistance, and means to direct a current of air onto said resistance.

4. In mechanism for producing electrical oscillations, the combination with a solid incandescent resistance; of a capacity and a self induction in parallel therewith, means to produce a magnetic field co-axial with said'resistance, and means to direct a coolmg current of air onto said resistance.

5. In apparatus for producing electrical oscillations, a circuit containing a solid mcandescent resistance having self induction, a capacity and self induction in parallel with said resistance, means to produce a strong magnetic field co-a'xial with said resistance and a rotary fan, arranged to direct a current of cooling air onto said resistance,

in direct relation to the oscillations superposed on said circuit.

6. In apparatus for producing electrical oscillations, a solid, inductive incandescent resistance, a capacity and self induction in parallel -with said resistance, adjustable 'an'ce,-ahd' anoscillating circuit in parallel with said resistance.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

' JOSEF SCHIESSLER. Witnesses: Josnr RUBAsoH, AUGUST FUGGER.

whose revolutions and number of blades are p 

